The movement looks quite new, but could be a replacement. I believe that is going to affect the value of the clock if its inner workings are not original, if the casing is antique. I'm not seeing a whole lot of age on the clock, and is that damage to the front right side of it or just something from flash photography? Can you determine what the decorative elements on the exterior of the clock case are made of- Wood, composition or plastic? Also if we can get a good look at any visible screw heads or the hinges, it would help to try to get a sense of if the clock is antique or a nice reproduction. Looking at the bottom might also help. Looking at the hardware and the construction of the clock, you want to look for any signs of machininging. The grate on the reverse of the clock looks very machine made, so I would look for other things that would indicate mass-production versus a handmade original. That doesn't mean it's not still a good clock. I'm not seeing any chipping or signs of wear on the gilding though. If it is old you should see some crazing (crackling) chipping etc at the edges. A clock repair store should be able to date it for you if you bring it to their shop.
